Combined cut-off and governor



(No Model.)

J. KELLY.

COMBINED GUT-OFF. AND GOVERNOR. No. 300,267. Patented June 10, 1884.

/fY f m mmwl IN f E` WM? fi, i zgz,

N. PETERS Prmwumugmpner. wnxingim n C ihr-irren @raras ,Perrier @lirica JOHN KELLY, OF FEORIA, ILLINOIS.

COMBINED CUT-OFF AND GOVERNOR.

Application tiled July :'i, 1881i.

*ECIFICATION forming part of Letters Patent No. 300,267, dated June l0, 1884.

(No model.)

To @ZZ whom may concern..t

Beit known that I, JOHN KELLY, of Peoria,

in the county of Peoria in the State of Illinois, have invented an Improved Combined Cut-Ofi' and Governor; andA I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the annexed drawings, making a part of this specification, in which like letters of reference refer to like parts, and in whichw Figure l represents a longitudinal section of the invention; Fig. 2, a plan view. Fig. 3 is a cross-section. Fig. 4 is a cross-section opposite to Fig. Fig. V5, a diagram of eccentric.

The object of this invention is the construction of means whereby any increase or diminution in the amount of work which an engine is doing alters accordingly the inlet of steam or other motive power int-o the cylinder. In this invention I have constructed a governing device which not -only acts in this way, but also directly upon the slide-valve. In iny engine I secure upon the driving-shaft an eccentric having a changeable throw. The driving-pulley is mounted not on the shaft itself, but upon a sleeve rotative thereon. This sleeve has means whereby a partial rotation of itself relative to its shaft shall in one direction increase the throw of the eccentric, and in the other direction shall diminish the throw oi' the eccentric: The rotation of the shaft is transmitted to the said collar or sleeve, and thereby to the drive-pulley, by means of some strong connection elastically impressible. Said eccentric connnnnicates directly with the slidevalve of the engine. Such a construction would enahle the resistance to the engines drive-pulley to control automatically the supply of steam to the engines cylinder.

In the drawings, G is the shaft; A, the eccentric; F, the sleeve; W, the drive-pulley; I3, the eccentric-strap, havingsuitable rod connecting it to the slide-valve. The eccentric A has through it a slot, A, in which slides the dog C C', fast upon the shaft G. By moving the center of the eccentric away from the center of the shalt G, its eccentricity and throw is increased, and decreased by an opposite movement. This slot A and dog Care so set relative to the shaft G that a line drawn through the geometrical center of the eccentrio parallel to the sides of the slot A is hetween the center ofthe shaft and the slide` valve. This offset position of said slot is for the purpose of giving the slide-valve thesanie lead, however much the ecccntricinay vary in its throw. sleeve F relative to the sha-it G to vary the throw of the eccentric A. in the following way: At the end of said sleeve, contiguous to the eccentric A, I secure a smallerL eccentric, E, but having sufficientthrow to be able, by less than an entire revolution of itseli.l relative to the shaft, to move the eccentric A tc`i ts greatest eccentricity or to its least. This eccentric Eis rotative within the box l), which is fitted between the parallel bars A Agfast on the eccentric A. As the eccentric E revolves in the box D, which can move casil y in the direction parallel to the bars A, but at right angles thereto is resisted, the eccentric A, connected with said bars, is caused to changeaccordingly its throw.

There are many ways of so connecting the sleeve F and the shaft G together as to allow them to vary, partially, their relative position when under an unequal resistance, but to rccover it again as soon as an equilibrium is restored between the applied and the resisting forces. Such ways are, by means of metal springs, coniincd gases or vapors, and combinations of these. In using a gas or vapor for this purpose, I have designed thc construction Shown in the drawings.

K Ais a one-headed cylinder fast upon the shaft G, and having an opening leading thereto through the said shaft from a pipe, L, rotative therein. The tubular piston II tits in said cylinder air-tight, and at its other end is adapted to receive the sleeve F. A slot, H', and pin or feather Hj causes them both to rotate together and still have longitudinal inotion relative to each other. The slot J in said piston and a pin, J, projecting from the shaft G, cause the said piston, and therefore its sleeve, to partially rotate upon its shaft whenever the said piston is moved away from the cylinder-head K. Steam or gas being forced in through the pipe.L into the cylinder Ii presses the piston away and toward the drivepulley YV, and causes, through the diagonal slotV J, a partial rotation oi' said wheel and its sleeve.

To prevent rusting of the cylinder and pis- I cause the partial rotation oi' the y IOO ton I usually iill said cylinder and the pipe L with oil or other liquid, against which I let the steam press.

\Vhen starting this engine, I first turn on the steam-pressure into the pipe L, and cause thereby the piston H to be impressed to its eX- treme limit. rllhis turns the sleeve F,through the eccentric E, block or box D, and the bars A', the eccentric A is given its greatest throw, and the slide-valve allowed its longest movement. A valve is then turned in the pipe L at a point where the oil or other liquid is not pressed into the cylinder` K, and steam turned on into the steam-chest of the engine. As the engine begins its motion and continues to increase its rapidity of revolution, it is ungoverned. Soon, however, as it approaches its maximum of speed, the engineer turns the valve in the pipe L, and allows the backward pressure of the engines load to affect the drivepulleyand the throw of the changeable eccentric A accordingly Vhen the said valve was closed, the oil filled completely the cylinderK and `prevented the repressing of the drivepulley 5 but upon the opening of saidvalve the elastic force of the steam is allowed to have its effect. Upon any increased resistance to the drive-pulley XV it is turned partially relative to its shaft, the eccentricity of the eccen tric A increased, and more steam admitted at each vstroke to the engines cylinder. Upon a decrease ofAresistance to the drive-pulley it is partially advanced by the pressure ofthe steam acting against the oil or other liquid in the cylinder K, and the eccentricity of the eccentric A, and the consequent supply of steam to the engines cylinder, diminished.

Vhat I claim as my invention, and for which I desire Letters Patent, is as follows, to wit:

I. In combination witlrthe divingshaft of an engine, the eccentric A,having slot A, the dog C, the sleeve F, having eccentric E, fast thereon, the box D, movable between the bars A, fast on eccentric A, and means whereby the backward turning of said sleeve upon said shaft shall be elastically resisted by said shaft, substantially as and for the purpose specified. 2. The driving-pulley NV, shaft G, having tubular end G, cylinder K, having slots J and H, and the pins J H2 therein, in combination with the sleeve F, drivepulley NV thereon, eccentric E,fast at oneend of said sleeve, boX D, eccentric A, having bars A and slot A, and the dog C.

v3. The eccentric A, having slot A, dog or block C,`1novable in said slot and fast on the shaft G, and the parallel bars A on said eccentric, in combination with the box D, movable between said bars, and .the eccentric E,secured to the end of the sleeve F, whereby the rotation of said sleeve sha-ll shift the eccentric A. In testimony that I claim the foregoing inventiou I have hereunto set my hand this 3d day of July, V1883.

v JOHN KELLY. lVitnesses:

H. IV. WELLs, E. W. QUINcY. 

